Rino did develop a slant parallelogram dérailleur in 1978 that was a blatant and butt ugly copy of Suntour's Cyclone and their later Crono dérailleurs also borrow heavily on Suntour designs... they may have paid licensing fees for these and the Crono series are a very nice shifting rear d that is also extremely lightweight.

The licensing makes some sense as Suntour, being Japanese, may have had some difficulty in the European market in the late seventies but an Italian company using Suntour designs would have had a considerable edge over much of the domestic competition.